1 files changed, 102 insertions, 0 deletions
diff --git a/source/lib/system/src/setting.cpp b/source/lib/system/src/setting.cpp
new file mode 100644
index 0000000..1553eae
--- /dev/null
+++ b/source/lib/system/src/setting.cpp
@@ -0,0 +1,102 @@
+#include "wanda/system/setting.hpp"
+
+#include <algorithm>
+#include <type_traits>
+
+namespace wanda::system
+{
+  // UDL implementations
+
+  key literals::operator""_key(char const * str, std::size_t len)
+  {
+    return key{{str, len}};
+  }
+
+  std::optional<setting> literals::operator""_setting(char const * str, std::size_t len)
+  {
+    auto source = g_settings_schema_source_get_default();
+    if (!source)
+    {
+      return std::nullopt;
+    }
+
+    auto schema = g_settings_schema_source_lookup(source, str, true);
+    if (!schema)
+    {
+      return std::nullopt;
+    }
+
+    return setting{schema};
+  }
+
+  // 'setting' implementation
+
+  setting::setting(GSettingsSchema * schema)
+      : m_schema{schema, &g_settings_schema_unref}
+  {
+  }
+
+  std::optional<setting::entry> setting::operator[](key key) const
+  {
+    if (!g_settings_schema_has_key(m_schema.get(), key.get().c_str()))
+    {
+      return std::nullopt;
+    }
+
+    return setting::entry{*this, std::move(key)};
+  }
+
+  // 'setting::entry' implementation
+
+  setting::entry::entry(setting const & setting, key key)
+      : m_settings{g_settings_new(g_settings_schema_get_id(setting.m_schema.get())), &g_object_unref}
+      , m_key{key.get()}
+  {
+  }
+
+  setting::entry::value_type setting::entry::operator*() const
+  {
+    auto value = std::unique_ptr<GVariant, decltype(&g_variant_unref)>{g_settings_get_value(m_settings.get(), m_key.get().c_str()), &g_variant_unref};
+    auto raw = value.get();
+
+    if (g_variant_is_of_type(raw, G_VARIANT_TYPE_BOOLEAN))
+    {
+      return static_cast<bool>(g_variant_get_boolean(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_INT32))
+    {
+      return static_cast<std::int32_t>(g_variant_get_int32(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_INT64))
+    {
+      return static_cast<std::int64_t>(g_variant_get_int64(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_UINT32))
+    {
+      return static_cast<std::uint32_t>(g_variant_get_uint32(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_UINT64))
+    {
+      return static_cast<std::uint64_t>(g_variant_get_uint64(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_DOUBLE))
+    {
+      return static_cast<double>(g_variant_get_double(raw));
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_STRING))
+    {
+      auto size = gsize{};
+      auto string = g_variant_get_string(raw, &size);
+      return std::string{string, size};
+    }
+    else if (g_variant_is_of_type(raw, G_VARIANT_TYPE_STRING_ARRAY))
+    {
+      auto length = gsize{};
+      auto data = g_variant_get_strv(raw, &length);
+      return std::vector<std::string>{data, data + length};
+    }
+
+    return {};
+  }
+
+}  // namespace wanda::system
+\ No newline at end of file